- Add UL to some constants [Truta]- Update minizip and vstudio [Vollant]- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h- Expand use of NO_DUMMY_DECL to avoid all dummy structures- Added iostream3 to contrib [Schwardt]- Replace rewind() with fseek() for WinCE [Truta]- Improve setting of zlib format compression level flags    - Report 0 for huffman and rle strategies and for level == 0 or 1    - Report 2 only for level == 6- Only deal with 64K limit when necessary at compile time [Truta]- Allow TOO_FAR check to be turned off at compile time [Truta]- Add gzclearerr() function [Souza]- Add gzungetc() functionChanges in 1.2.0.1 (17 March 2003)- Add Z_RLE strategy for run-length encoding [Truta]    - When Z_RLE requested, restrict matches to distance one    - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE- Correct FASTEST compilation to allow level == 0- Clean up what gets compiled for FASTEST- Incorporate changes to zconf.in.h [Vollant]    - Refine detection of Turbo C need for dummy returns    - Refine ZLIB_DLL compilation    - Include additional header file on VMS for off_t typedef- Try to use _vsnprintf where it supplants vsprintf [Vollant]- Add some casts in inffast.c- Enchance comments in zlib.h on what happens if gzprintf() tries to  write more than 4095 bytes before compression- Remove unused state from inflateBackEnd()- Remove exit(0) from minigzip.c, example.c- Get rid of all those darn tabs- Add "check" target to Makefile.in that does the same thing as "test"- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in- Update contrib/inflate86 [Anderson]- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]- Add msdos and win32 directories with makefiles [Truta]- More additions and improvements to the FAQChanges in 1.2.0 (9 March 2003)- New and improved inflate code    - About 20% faster    - Does not allocate 32K window unless and until needed    - Automatically detects and decompresses gzip streams    - Raw inflate no longer needs an extra dummy byte at end    - Added inflateBack functions using a callback interface--even faster      than inflate, useful for file utilities (gzip, zip)    - Added inflateCopy() function to record state for random access on      externally generated deflate streams (e.g. in gzip files)    - More readable code (I hope)- New and improved crc32()    - About 50% faster, thanks to suggestions from Rodney Brown- Add deflateBound() and compressBound() functions- Fix memory leak in deflateInit2()- Permit setting dictionary for raw deflate (for parallel deflate)- Fix const declaration for gzwrite()- Check for some malloc() failures in gzio.c- Fix bug in gzopen() on single-byte file 0x1f- Fix bug in gzread() on concatenated file with 0x1f at end of buffer  and next buffer doesn't start with 0x8b- Fix uncompress() to return Z_DATA_ERROR on truncated input- Free memory at end of example.c- Remove MAX #define in trees.c (conflicted with some libraries)- Fix static const's in deflate.c, gzio.c, and zutil.[ch]- Declare malloc() and free() in gzio.c if STDC not defined- Use malloc() instead of calloc() in zutil.c if int big enough- Define STDC for AIX- Add aix/ with approach for compiling shared library on AIX- Add HP-UX support for shared libraries in configure- Add OpenUNIX support for shared libraries in configure- Use $cc instead of gcc to build shared library- Make prefix directory if needed when installing- Correct Macintosh avoidance of typedef Byte in zconf.h- Correct Turbo C memory allocation when under Linux- Use libz.a instead of -lz in Makefile (assure use of compiled library)- Update configure to check for snprintf or vsnprintf functions and their  return value, warn during make if using an insecure function- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that  is lost when library is used--resolution is to build new zconf.h- Documentation improvements (in zlib.h):    - Document raw deflate and inflate    - Update RFCs URL    - Point out that zlib and gzip formats are different    - Note that Z_BUF_ERROR is not fatal    - Document string limit for gzprintf() and possible buffer overflow    - Note requirement on avail_out when flushing    - Note permitted values of flush parameter of inflate()- Add some FAQs (and even answers) to the FAQ- Add contrib/inflate86/ for x86 faster inflate- Add contrib/blast/ for PKWare Data Compression Library decompression- Add contrib/puff/ simple inflate for deflate format descriptionChanges in 1.1.4 (11 March 2002)- ZFREE was repeated on same allocation on some error conditions.  This creates a security problem described in  http://www.zlib.org/advisory-2002-03-11.txt- Returned incorrect error (Z_MEM_ERROR) on some invalid data- Avoid accesses before window for invalid distances with inflate window  less than 32K.- force windowBits > 8 to avoid a bug in the encoder for a window size  of 256 bytes. (A complete fix will be available in 1.1.5).Changes in 1.1.3 (9 July 1998)- fix "an inflate input buffer bug that shows up on rare but persistent  occasions" (Mark)- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)- fix gzseek(..., SEEK_SET) in write mode- fix crc check after a gzeek (Frank Faubert)- fix miniunzip when the last entry in a zip file is itself a zip file  (J Lillge)- add contrib/asm586 and contrib/asm686 (Brian Raiter)  See http://www.muppetlabs.com/~breadbox/software/assembly.html- add support for Delphi 3 in contrib/delphi (Bob Dellaca)- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)- added a FAQ file- Support gzdopen on Mac with Metrowerks (Jason Linhart)- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)- avoid some warnings with Borland C (Tom Tanner)- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)- emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)- allow several arguments to configure (Tim Mooney, Frodo Looijaard)- use libdir and includedir in Makefile.in (Tim Mooney)- support shared libraries on OSF1 V4 (Tim Mooney)- remove so_locations in "make clean"  (Tim Mooney)- fix maketree.c compilation error (Glenn, Mark)- Python interface to zlib now in Python 1.5 (Jeremy Hylton)- new Makefile.riscos (Rich Walker)- initialize static descriptors in trees.c for embedded targets (Nick Smith)- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)- add the OS/2 files in Makefile.in too (Andrew Zabolotny)- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)- fix maketree.c to allow clean compilation of inffixed.h (Mark)- fix parameter check in deflateCopy (Gunther Nikl)- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)- Many portability patches by Christian Spieler:  . zutil.c, zutil.h: added "const" for zmem*  . Make_vms.com: fixed some typos  . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists  . msdos/Makefile.msc: remove "default rtl link library" info from obj files  . msdos/Makefile.*: use model-dependent name for the built zlib library  . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:     new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)- replace __far with _far for better portability (Christian Spieler, Tom Lane)- fix test for errno.h in configure (Tim Newsham)Changes in 1.1.2 (19 March 98)- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)  See http://www.winimage.com/zLibDll/unzip.html- preinitialize the inflate tables for fixed codes, to make the code  completely thread safe (Mark)- some simplifications and slight speed-up to the inflate code (Mark)- fix gzeof on non-compressed files (Allan Schrum)- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)- do not wrap extern "C" around system includes (Tom Lane)- mention zlib binding for TCL in README (Andreas Kupries)- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)- allow "configure --prefix $HOME" (Tim Mooney)- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)- move Makefile.sas to amiga/Makefile.sasChanges in 1.1.1 (27 Feb 98)- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)- remove block truncation heuristic which had very marginal effect for zlib  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the  compression ratio on some files. This also allows inlining _tr_tally for  matches in deflate_slow.- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)Changes in 1.1.0 (24 Feb 98)- do not return STREAM_END prematurely in inflate (John Bowler)- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)- compile with -DFASTEST to get compression code optimized for speed only- in minigzip, try mmap'ing the input file first (Miguel Albrecht)- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain  on Sun but significant on HP)- add a pointer to experimental unzip library in README (Gilles Vollant)- initialize variable gcc in configure (Chris Herborth)Changes in 1.0.9 (17 Feb 1998)- added gzputs and gzgets functions- do not clear eof flag in gzseek (Mark Diekhans)- fix gzseek for files in transparent mode (Mark Diekhans)- do not assume that vsprintf returns the number of bytes written (Jens Krinke)- replace EXPORT with ZEXPORT to avoid conflict with other programs- added compress2 in zconf.h, zlib.def, zlib.dnt- new asm code from Gilles Vollant in contrib/asm386- simplify the inflate code (Mark): . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new() . ZALLOC the length list in inflate_trees_fixed() instead of using stack . ZALLOC the value area for huft_build() instead of using stack . Simplify Z_FINISH check in inflate()- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with  the declaration of FAR (Gilles VOllant)- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)- read_buf buf parameter of type Bytef* instead of charf*- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)- fix check for presence of directories in "make install" (Ian Willis)Changes in 1.0.8 (27 Jan 1998)- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)- added compress2() to allow setting the compression level- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)- use constant arrays for the static trees in trees.c instead of computing  them at run time (thanks to Ken Raeburn for this suggestion). To create  trees.h, compile with GEN_TREES_H and run "make test".- check return code of example in "make test" and display result- pass minigzip command line options to file_compress- simplifying code of inflateSync to avoid gcc 2.8 bug- support CC="gcc -Wall" in configure -s (QingLong)- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)- fix test for shared library support to avoid compiler warnings- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)- do not use fdopen for Metrowerks on Mac (Brad Pettit))- add checks for gzputc and gzputc in example.c- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)- use const for the CRC table (Ken Raeburn)- fixed "make uninstall" for shared libraries- use Tracev instead of Trace in infblock.c- in example.c use correct compressed length for test_sync- suppress +vnocompatwarnings in configure for HPUX (not always supported)Changes in 1.0.7 (20 Jan 1998)- fix gzseek which was broken in write mode- return error for gzseek to negative absolute position- fix configure for Linux (Chun-Chung Chen)- increase stack space for MSC (Tim Wegner)- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)- define EXPORTVA for gzprintf (Gilles Vollant)- added man page zlib.3 (Rick Rodgers)- for contrib/untgz, fix makedir() and improve Makefile- check gzseek in write mode in example.c- allocate extra buffer for seeks only if gzseek is actually called- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)- add inflateSyncPoint in zconf.h- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.defChanges in 1.0.6 (19 Jan 1998)- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and  gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)- Fix a deflate bug occurring only with compression level 0 (thanks to  Andy Buckler for finding this one).- In minigzip, pass transparently also the first byte for .Z files.- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()- check Z_FINISH in inflate (thanks to Marc Schluper)- Implement deflateCopy (thanks to Adam Costello)- make static libraries by default in configure, add --shared option.- move MSDOS or Windows specific files to directory msdos- suppress the notion of partial flush to simplify the interface  (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)- suppress history buffer provided by application to simplify the interface  (this feature was not implemented anyway in 1.0.4)- next_in and avail_in must be initialized before calling inflateInit or  inflateInit2- add EXPORT in all exported functions (for Windows DLL)- added Makefile.nt (thanks to Stephen Williams)- added the unsupported "contrib" directory:   contrib/asm386/ by Gilles Vollant <info@winimage.com>        386 asm code replacing longest_match().   contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>        A C++ I/O streams interface to the zlib gz* functions   contrib/iostream2/  by Tyge L鴙set <Tyge.Lovset@cmr.no>        Another C++ I/O streams interface   contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>        A very simple tar.gz file extractor using zlib   contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>        How to use compress(), uncompress() and the gz* functions from VB.- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression  level) in minigzip (thanks to Tom Lane)